So after using some used hexes I bought I noticed there was a small bend in the cables. Like the cable was smushed. It worries me but I feel like the hexes should still be bomber. I am not sure, new to trad climber, figured I should get some 2nd opinions.

Bends in cables happen all the time, especially if the piece has held falls or been weighted. No need to straighten it, although you can rotate the wire and reposition the kink if it makes you feel more comfortable...

Bends in cables happen all the time, especially if the piece has held falls or been weighted. No need to straighten it, although you can rotate the wire and reposition the kink if it makes you feel more comfortable...

You donīt need to straighten it but you can either see if the strands are damaged beforehand or wait until you fall off and straighten it! Though on the one shown I wouldnīt bother either.

Don't worry too much about 'weakening' the aluminum. Before wire and before spectra, hexes were drilled for cordage up to 9mm. When BD sold 5mm "Gemini" cord, they also sold plastic inserts to reduce the existing hole size so the 5mm cord would fit tightly.